A mystery to me..... [RE-wrenches]

[Matt Tritt]

Aren't you glad you had the urge to put your problem to the group? The best
and least expensive of all possible outcomes.

Matt T
----- Original Message ----- 
From: <penobscotsolar at midmaine.com>
To: <RE-wrenches at topica.com>
Sent: Tuesday, October 21, 2003 12:39 PM
Subject: Re: A mystery to me..... [RE-wrenches]


> Hi all,
>   Well, the verdict is in. Sorry, it took me a day to get a KS cell so
this
> six hour round trip didn't have to be repeated again.
>   I took with me a 24 v, 100 watt bulb to act as a load since I didn't
want
> the inverter to go into involuntary shutdown any more. After taking SG
> readings on each cell (1.27 + for each one) and voltage readings(again) on
> each one (2.13 - 2.15) I divided the bank into 2 24 volt banks and put my
> load (the bulb) on the first one.It ran fine and I checked each 2 volt
cell
> and got almost the same exact reading as I did without the load. OK, that
> half of the bank is good.....
>   I next did the same with the second bank. The bulb lit up and
immediately
> dimmed. The fourth battery in the string, which read 2.13 v no load read
>  -.78 v. The polarity was reversed internally.
>   I replaced the cell, retested the bank (the bulb didn't dim) and took
> readings on the rest of the cells. They were all fine.
>   After tightening all connections I fired up the system and ran some
larger
> loads (refrig. well pump) and all was/is well.
>   After this experience this NABCEP test this weekend is looming extremely
> large in front of me...............
>   Thanks for all who contributed.
> Daryl
> Penobscot Solar Design
>
>
>
> Carl Emerson, Free Power Ltd. writes:
>
> > Hi gang,
> >
> > I have struck one bad cell going into reverse polarity and pulling the
> > bank voltage down big time..
> >
> > We will soon all know I guess.
> >
> > Cheers
> >
> > Carl Emerson
> > Free Power Ltd.
> > Auckland NZ
> >
> > Jay Peltz, Peltz Power wrote:
> >
> >> HI all,
> >>
> >>
> >> I think that its time to get the clamp on amp meter here.  You should
be
> >> able to pinpoint the  bad connection via that.  I do agree that the
> >> problem
> >> is a bad connection ( battery cable) or a bad cell..  Also you should
be
> >> able to increase the load and measure the voltage drop and find the
> >> problem.
> >>
> >> Please keep us informed as to what it turns out to be!!
> >>
> >>
> >> jay
> >>
> >> Peltz PowerJay Peltz, Peltz Power wrote:
> >>
> >
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